A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 4140-01-094-6836
NSN 5855-01-657-7657
NSN 6220-00-451-8760
NSN 5985-01-094-5865
NSN 6145-01-657-6041
NSN 5950-00-422-3484
NSN 6620-01-406-3584
NSN 5855-00-149-0766
NSN 5975-01-155-6574
NSN 5935-01-527-7923
NSN 6135-00-911-9321
NSN 6240-00-940-8294